tonnage
/ˈtʌnɪdʒ; `tʌnɪdʒ/ n[U, C]
1 (nautical 海)
(a) size of a ship, expressed in tons (ton1) （船的）吨位.
(b) amount of cargo a ship can carry, expressed in tons (ton 3b) （船的货运的）吨位.
(c) size of a country's merchant fleet, expressed in tons (ton3a) （一国商船船队的）吨位.
2 (commerce 商) charge per ton for carryingcargo or freight 每吨货物的运费.